Air-operated testing device



` Feb. 9 1926.

R. H. MUELLEVR ET AL AIR OPERATED TESTING DEVICE Filed Nov. 5, 1921 3 vSheets-Sheet 2 Z'nverforas McrHHuQZkr.

.Flein 9 926.

, f 1,571,958 R. H. MUELLER er Ar.

AIR OPERATED TESTING DEVICE Filed Nov. 3. 1921 3 Shets-Sheet 3 A l Y Jnvezrs:

oerjfueller and www." yg 0b? Patented Feb. 9, 1926.

ROBERT I-I. MUELLER AND vCHES'IER W.

I-IATHAWAY, OF DCATUR, ILLINOIS, AS-

SIGNORS TO ADOLPH MUELLER, TRUSTEE, 0F iDECATUR, ILLINOIS.

Application filed November T0 all io/10m t may' concern: s

Be it known that we, ROBERT H. MUELLER and Cnns'rnr. lV. HATHAWAY, citizens of the United States, residing at VDecatur', in the county of Macon and State of Illinois, have invented new and useful VImprovements in Air-Operated Testing Devices, of which the following is a specification.

y,The invention herein disclosedrelates to testing apparatus, and isk intended for use in the testing for porosity of cocks, pipe sections, and similar' articles having fluid passages therethrough, it being designed, furthermore, fortesting key cocks for key leakage as well. as for porosity of the metal of which they are formed.

It will be shownas applied to key cocks, but it will he understood that it may be used with articles other than those specifically shown, as this disclosure is merely illustrative, and in no sense restrictive, of the invention.

In `order that the development may be cleark to those skilled in the art, there is shown Vin the accompanying drawings physical embodiments of that invention, and in said drawings:

Fig. 1 is a view' in side elevation of the device, parts of the structure rbeing broken away for clearness-of illustration.

Fig. 2 is a view in elevation, substantially at' right angles to the, viewV shown in Fig. 1, looking from the left, illustrating attachments for the device shown in Fig. 1 for use in testing anangle cock.

Fig. 3 is a view of the operating leve-r for the pressure head attachment shown in Fig. 2. s

Fig. i is a detail view of the cock holding arm of Fig. 2.

Fig. 5 is a detail of adiiferent, but equiv-a` lent form of operating mechanism for the device shown in Fig. 2.

Fig. G is a detail viewin section of the adjustable coupling for the removable heads shown in the several views.

Fig. 7 is a detail sectional view of the relief device for the pressure heads shown in the several views.

Referring to the drawings by numbers, like numbers indicating like parts in the several views, the device comprises a suitable frame, mounted upon any proper sups, 1921. semi no. 512,696.

port, said frame having the base 10, stand- Aard 11 rising from said base, and, at its up-` 55 y per end, said standard is provided with a head 12 to which the operating parts are secured. I

filhe base 10 has .a recessed Yboss 13, in

'which is mounted ka cock-receiving seat or 60 pad 111 of resilient or yielding material, and, preferably, the said yielding seat 14; is some-- what loosely mounted, as shown, within theA recess, so that in eventy of water getting beneath the pad, it will not be trapped and,

due to pressure, unseat the pad 1st from the recessed boss 18. The said pad 14 is centered in its seat by means of the pipe 15, which passes upwardly through the base 10 and the boss 13, and through a suitable apern kture in the pad la; the said pipe 15, as will hereinafter appear, being-for the purpose of supplying fluidunder pressure for testing purposes, any suitable supply, as 1G, being provided for the pipe 15.

Secured to the head 12 of the standard 11 is the `fluid pressure cylinder 17, of any suitable type, and within that fluid pressure cylinder isthe reciprocating piston" 18. The.

piston 18, as here shown, is given its thrust S0 in onerdirection by iiuid pressure coming from the pipe 19, whiclris connected with any suitable source and provided with any suitable inlet and exhaust valve controls, so

ythat the operator, at will, can throw pressure against the piston 18 or release it. The piston 18 1s actuated 1n the opposite `direction in the present disclosure, by the spring 20, which normally tends to raise it, but it is obvious that, if desired, the piston could be operated by pressure in both directions by making the suitable connections, as is common in operating pistons by luidpressure. In the construction shown in Fig. 1,

in which the lifting spring Q0 is utilized to 95 A raise. the piston 18, thrust rod 21, and the head 23, it will be seen that anautomatic release of the article held in the apparatus will be effected, for immediately' pressure is` released above the piston 18, the spring 2O '100 will move the piston and its associated parts upwardly, releasing the article held between pressure heads, and lno manual operation to effect this release is necessary other than the release of pressure above the piston 18.

Att-ached to the piston 18, in any suitable nianner. is the thrust rod 2l. said thrust rod panning' through an)` suitable openingY or guide 22 at ita point oi exit troni thel piston ehaiuher li'. ln that 'torni ot the invention where the lifting spring Qt) used to ele *ate the piston and its asaoeiated parts, the opening through whieh the thrust rod pannen. will he ol Such dimension `in Cross sez-tion as will permit preasure to escape past the thrust rod 2l fio that it the Huid should get helow the piston. it eau es lape and no opimsiiigr preaaure will he huilt up helow the pieton itl. Seeured to the lower end ot the thrust rod Il is the pressure head 253. this preesure head heine` adjustahly seenred. no that the ell'eetire length ot lnoveuient ot the had ina;` he *aried ilu the partieular einlmdiuient here shown. that adjuatnient ia Seeured h i' a aerew thraid eonneetion la tween the thrust rod 2l and the head f3-l. ao that the head niaiv he run up and down ou the rod to ahorten or lenathen ital ell'eetire Stroke. The said heat. ahown in lflgr. (i is a partiall)Y split, h lad. with the tigrl'iteninp; Sierew lll). so that a'lter the head Eil has,` heen onee aifljusted tor proper length ot atrolce. it may then he tightened in ita adjuated posa'- tion and danger ot its niorenient on the aerewvthreaded eonneetion -l during' operation ol the niaehine is avoided.

The Said h'iad Q?, is provided. at its lower end, with a ree-ess in whieh is mounted a yielding pad 2li, aiinilar to the pad ll here'- totore deaerihed. and Similarly;v disposent with reapeet to the recess. heine' somewhat smaller than that reees's so as to avoid ainy danger ot aeeuniulation ot haelt preSSure henea h that pad. au pointed out in eonneetion with the pad l-l. Centrali;v ot the parl 2li is a pipe 52T whieh pri'ijeets upwardlyv into the head and ia coupled with a latera pas sage or pipe at the outer end ot' whieh ia mounted a Coeli or 'taueet 30. whieh nia he turned to eloae the pasfao'e 2i" and the rertieal paeagre 2T. or to open theiu a3 may he desired.

lWith the nirts eonatrueted an Shown and deierihed the operatione!4 tor testing); article@` for porosity. and. in the 'fano ot' her-eoelira. or leakage past they hers. will he as tolloive. rlhe eoek. eonrentionally indicated in dotted linee. in Figi. 1` tl e nartieillar ti'pe Shown heine.' a ltejweoelt. will he plaeed in the ponition Shown with one ol. ita eonneetiugr nii:-v plei seated upon the pad lilorer the tluid preanure inlet li t'or the teatingr lluid. The tluid preeesnre will then he thrown liji' pipe 19 on to the pieton lll. tort-ingr it downwardly together with the thrust rod 2l and the, head Sil. whieh has heen adjusted as to leupjl'h oi atrolte tor the partieular type oi' roel: heine' teffted. so that the head fil will eoiue down upon the eoelt. and the pad 2li. with the pine il?. eonipreesled upon it. and this eoniprebsion heing transmitted through the eoek to the pad Ll, tluid tight joints arel l'orined with the open ends o l" the Coeli-hotly. '.lhe touting` lluids will then he admitted hy the pipe lli and inlet l5 to the interior ol the eoel; hody, and it it he a key eoelc, the hay vill he turned to open position so that the testingA tluid :an till the body ot' the eoelt. '.lhe taueet ill). at the end ot the lateral passage tt. will he eloiaed so that therex eau he no eaeape ot lluid hy that reauage. rthe te -ttingj preesure ean he run up to the deaired degree, and the operator )au oh serre the eoelt under preaaure and daiteriuine` whether or not it is detective hf; reason olf porosity or itault iu the metal. Vt'or under the retained preasure in the eoeli hotly. porosity will he Shown hy leakage throiugh au \y tault in the wall olf the eoelohody whieh mag7 he present.

"dlhen it deaired to test Ytor ke); faulta in eonneetion with hei' eoelia ot the type Shown in AFig: l. tho heyy ot the eoelt. will he turned to rlosl'ed postitiou. and the 'aueel ilu, troni the passage :lll and the plenaire ill'. whieh eoiuiiunieates with the interior ot tho eheh. will he opened. Pressure then heine' applied to the lower parl o'tthe eoehthrough the passai-e l5. will stand against theelosed l-:eyv ot the eoelc. and it' there he au); leakage alamit that ker. .ao asi to perniit the touting; tlnid to pasa. it will he at onee apparent hy reason ot tiow or drip troni the tain-et, any' .auitahle waate heinjg' provided to reeeiio drip troni taueet Ill).

ln the `l'oriu ol' the invention Shown in Al"`i. l. it will he ohaerved that artielesueh as eoelis, 'an he tested where the ends ol the roel; hod are in the naine, or Substantially the saine.` longitudinal line. ln order that the deviee lua): he adapted to test angle eoelta. without any u'iaterial or lnhstautial etrange iu its atrueture, the 'loria Iahown in Vio'. i2 is provided. The, torni `Shown in Fig. idenlieal in the main with that shown in Fie'. l, exeeilit that it has attaehnientri; whieh will he auhatituted where the deviee ia used l'or testine; anale eoeka. lt will have the saine hase, standard. and preanure eyliuder. an, desrrihed in eouneetion with Fig. l, hut, in place ol the upper pressure head 1t) harina' the )fieldingpad to engage, the roel; hodjy'. there will he provided the head 2S) whieh will le adjustahlr mounted and elaiuped upon the thrnz-:t rod ill exaetlv an deuerihed in eonueetiou with the adjustable head ot Fia. l. and aa Shown in liip'. l. lnsztad ot' the pressure pad to engage the eoel; hodti'. the Laaid head :29 will he provided with a deirieiuliuer rali'e engaging dei'ire 3;?. here shown as, a Alorie. whirh paasea heneatli the handle olE a ralre ao au to hohl it liriulr. whieh lorl, will when the head is inored downwifrdly h r the piston in the pressurel eylinder Ill. torre the ralve hodv down against the pad l-l in the hows lo of the base lll] of the machine, there being provided the same` testing fluid inlet or pipe 36, as appears in Fig. 1. It will thus be seen that the angle cock is clamped in position against the lower pad exactly as in the other form or' the invention.- The angle cock has the side nipple 37, which may be disposed at various angles relative to the cock body and the inlet at the bottom of the valve, and in order that this may be sealed, we provide an attachment, comprising the bracket 38 which is secured to the base of the device by being seated in a recess formed in the side wall of the base, as shown in Fig. 2 in dotted lines, and secure it in place by means of the single Abolt 39 so that the bracket will be held firmly with respect to the main part oi' the machine. The bracket may, of course, take such angular position as the work de mands; It the nipple 37 be at right angles, av bracket of right angular formation may be used. It it be inclined to an angle greater than a right angle to the body of the cock, as shown in Fig. 2, the bracket will be made with a corresponding incline.

Mounted in suitable supports, as, for eX-v ample, the lug 4() on the bracket 3S, is a reciprocating head 41 having a recessed base and a sealing pad 42 of a character similar to that described in connection with the pressure head ot the form shown in Fig. 1. Centrally of pad 42 is disposed'the pipe 43, coupling with the branch passage 44 in a manner similar to the construction ol the pad and. head of the form shown in Fig. 1, and a faucet, similar to the faucet 30 shown in" Fig. 7, may be attached to the lateral passage 44. The head 41 is provided with a thrust rod 45, headed or otherwise suitably formed at its rear end, so as to retain between the headed and 311i' #In 111.g- 40 the spring 4G, which spring tends normally to keep the head 41 retracted position. Mounted on a suitable pivot lug 47 is an actuating cam 48 irovided with a handle 49, which, when thrown to its operating position, will drive the head 43 inwardly against .the nippler 37 so that the yielding pad 42 will seal that nipple, and the cock is then in position for testing..

The operations of testing with the angle cock type of device, both for wall porosit-y and key leakage, will be identical with the operations heretofore described in connection with Fig. 1.

In the form of the invention shown in Fig. 5, an equivalent, but dinerent, type of actuating mechanism is shown. Instead of the piston chamber disclosed in the other view and heretofore described, there is provided a diaphragm chamber 50 in which is clamped the diaphragm 51, having the usual pressure plate 52, and coupled to the diaphragm is the thrust rod 53, the parts being normally held in raised position by the. spring 54 in the lower part of the dia- Dhraem chamber enO'aOinO' at its u 3er end l D b b C, 7

the pressure plate 52. Preferably, the thrust rod will have an extension 55 at its upper end passing through a guide opening in the top of the diaphragm chamber and into a pressure retaining cap 56. A There will be provided the pressure connection 5.7 from any suitable source of pressure, delivering above the diaphragm, and provided, of course, with suitable control devices for admitting and releasing pressure above the diaphragm. As shown in Fig. 5, the diaphragm is under pressure from the inlet 57, and forced downwardly, with the thrust rod 53, which carries the pressure head, in its down position. Obviously, instead o the spring lift for the diaphragm shown, such diaphragm could be operated Vin both directions by pressure by providing suitable inlet and exhaust connections, in a manner similar torthat suggested in connection with the piston type of device.

From the foregoing, it will be seen that there is provided a testing machine which may be conveniently used for testing, both for porosity and for key leakage ot valve bodies, valve seats and the like, without removing the cock from the machine, and that it is adapted for handling straightway cocks, angle cocks, etc., without any radical change in the construction or operation.

Mechanical changes, and the adoption of equivalent expedients, other than those herein shown, to carry out our invention, may be made without'departing from the range thereof, an-d it will be understood, further, that the phrase fluid pressure includes hydraulic or air pressures.

le claim: i

1. In apparatus for testing cocks and the likeA for porosity and key leakagethe combination of a base to receive a cock nipple and having an inlet lior iuid pressure, a movable pressure head to engage the other nipple ot the cock andhaving a fluid-pressure outlet passage providing circulation through said inlet, cock and outlet, and means for -opening and closing said outlet passage.

2. Inapparatus for testing cocks and the like Vfor porosity and key leakage, the com? bination of a base having a resilient seat to receive a cock nipple and an inlet for fluid pressure, a normally retracted movable pressure head having a resilient seat to receive the other `nipple of the cock and having a iluid pressure outlet passage providing circulation through said inlet, cock and outlet, and a control cock for said passage.

8. In apparatus for testing cocks and the like for porosity and key leakage, the combination o1 a base having a resilient seat to receive La cock nipple and an inlet for liuid pressure, a movable pressure head havlll) disposed having a nipple receiving aperture,

1G. In apparatus for testing angle cocks and the like, the combination of a base to receive a cock and having a fluid pressure passage, a normally retracted fluid pressure head to engage the other nipple of the cock disposed at an angle to the axis of said base, and cock engaging means movable substantially parallel to the axis of said base to clamp a cock in position.

17. In apparatus for testing angle cocks and the like, the combination of a base to receive a cock nipple and having a fluid pressure passage, a movable head to clamp a cock to said base and hold it against lateral displacement, a movable pressure head disposed at an angle to said cock to engage the other nipple of the cock, and means for actuating said pressure head.

18. In apparatus for testing angle cocks and the like, thevcombination f a base to receive a cock nipple and having a fluid pressure passage, a movable head having cock handle engaging means to clamp a. cock upon said base and hold it against lateral displacement, a movable pressure head at an angle and inclined relative to said cock to engage the other cock nipple, and means for actuating said pressurehead.

19. A pressure head for testing apparatus having a socket in its face, va nipple projecting substantially centrally of said socket, a resilient seat mounted in said socket and said head having laterally disposed passage leading 'from said nipple at the outside of said head.

Q0. A pressure head for 'testing apparatus having a socket in its face, a nipple projecting substantially centrally of said socket, a resilient seat ot less area mounted in said socket and having a nipple receiving aperture, a laterallv disposed passage leading 'from said nipple at the outside of said head, and flow controlling means for said lateral passage.

2l. A pressure head for testing apparatus having a solid nipple engaging portion and an integral split sleeve extending therefrom.

22. Appressure head for testing apparatus having a solid portion provided ivith a sockcled nipple engaging portion, a resilient seat in said socketed portion, and an 'integral split sleeve extending therefrom.

A pressure head for testing apparatus having a solid portion provided with a socketed face, a` resilient scat in said socket, a fluid passage traversing said solid portion and delivering to a lateral Wall, and an intethan the socketv gral threaded split sleeve extending from said solid portion.

2st. In a` testing apparatus, the combination of a base to receive a cock nipple and having an inlet for fluid pressure, a movabltI pressure head to engage the other nipple of the cock, and having a fluid outlet passage, manually controlled means for moving said pressure head in one direction, andmeans automaticallyrto move said pressure head in the opposite direction.

25. In a testing apparatus, the combina tion of a base to receive a cock nipple and having an inlet for fluid pressure, a movable pressure head to engage the other nipple of the cock and having a fluid pressure outlet passage, manually7 controllableV fluid pressure operating means for moving said pressure head in one direction, and means automatically to move said head in the opposite direction upon release of fluid pressure.

Q6. In a testing apparatus, the combination of a base to receive a cock nipple and having an inlet for fluid pressure, a movable pressure head to engage the other nipple of the cock and having a fluid pressure outlet passage, a manually controllable fluid pressure operated piston for moving said head in one direction, and means automatically to move said head and piston in the opposite direction on release of fluid pressure.

27. In a testing apparatus, the. combination oit a base to receive a cock nipple and having an inlet for rfluid pressure, a movable pressure head to engage the other nipple of the cock and having a fluid pressure outlet passage, a fluid pressure operated piston for moving said head in one direction, and a spring automatically to nieve said head and piston in the opposite direction on release of fluid. pressure.

Q53. In a testing apparatus, the combination of a buse to receive a cock4 nipple and having` an inlet 'for lluid pressure, a movable pressure head to engage the other nipple of the cock and having a fluid pressure outlet i'iassage, a casing, a piston in said casing, a. thrust rod coupling said piston and movable head, fluid pressure connections onone side oit said casing to artuate said piston, and a spring on the other side of said piston auto ignatically to move said piston in the opposite direction upon release of fluid pressure.

In testimony whereof ive have hereunto set our hands.

nonnnlfr n. MUELLER. onns'rnn iv. narnaiviir.

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